Okay so I went to back out of my driveway today and when I started driving I noticed my truck was really jumpy, almost like it's in 4 low, and as I started driving I heard a whining noise go faster as I went faster so I stopped and went back home, the whine sounds like the 4lo whine, I put truck in neutral and tried switching my **** back and forth to get in 2wd, took for test drive...same noise and jerkyness, I jacked up rear end and blocked front tire, 1st I grabbed front drive shaft and tried to twist it as it should in 2wd, but I could only move it back and forth about 1-2 inches. Then I started truck and put in drive, rear tires spin perfect without the whine, front drive shift wasn't spinning like its supposed to, then I hopped in and tapped the gas as it was still in drive, then my whole truck jerked like it was in 4lo and I heard the noise... Truck can still spin back tires. It seems like my truck is in 2wd, but it thinks it's in 4lo so it has its jerkyness. I have no clue what to do

 

Bring it to a shop.

 

I'd rather fix it myself though and save money

 

Shops will diagnose it for 35-100. You can fix it on your own once you know what's wrong.

 

okay I will, you have no idea though tackle?

 

http://www.ford-trucks.com/forums/92...97-2003-a.html

 

thank you

 

Maybe it has something to do with this issue?

https://www.f150forum.com/f6/4x4-pop...issuse-307348/

In that post you said your shift motor was at fault, maybe you didn't fix it properly / it went out? IDK.

 

99% of 4x4 issues with ESoF are GEM issues.

 

i think it might have to do with the t case itself, I put a new one in "new to me" and now it does this